Minnesota Law Enforcement Evidence
Technician Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. What is the primary purpose of maintaining chain of custody for
evidence?
A. To increase conviction rates
B. To ensure evidence integrity from collection to court
C. To allow officers to analyze evidence privately
D. To speed up laboratory processing
B. To ensure evidence integrity from collection to court
The chain of custody documents every transfer of evidence to
preserve its authenticity and prevent tampering or contamination.
2. Which item is most critical when labeling physical evidence?
A. Officer’s personal opinion
B. Suspect’s confession
, C. Unique case identifier
D. Media publication date
C. Unique case identifier
A unique case identifier ensures evidence can be accurately traced
back to the correct investigation.
3. What is the first action at a crime scene for an evidence technician?
A. Interview witnesses
B. Collect all visible evidence immediately
C. Secure and protect the scene
D. Write the final report
C. Secure and protect the scene
Securing the scene prevents contamination, loss, or alteration of
evidence before processing begins.
4. Which of the following best describes trace evidence?
A. Large weapons found at a scene
B. Testimonial statements from witnesses
C. Small, often microscopic materials transferred during a crime
D. Digital video recordings
C. Small, often microscopic materials transferred during a crime
Trace evidence includes materials like hair, fibers, and paint chips
that can link suspect and victim.
5. What is the proper packaging for a wet biological sample?
A. Airtight plastic bag
, B. Paper bag or breathable container
C. Glass container
D. Aluminum foil only
B. Paper bag or breathable container
Wet biological evidence must be air-dried and stored in breathable
packaging to prevent mold and degradation.
6. Which principle governs the admissibility of scientific evidence in
many courts?
A. Miranda Rule
B. Frye or Daubert Standard
C. Exclusionary Rule
D. Double Jeopardy Rule
B. Frye or Daubert Standard
These standards determine whether scientific evidence is reliable and
admissible in court.
7. What is contamination in forensic evidence handling?
A. Enhancing evidence clarity
B. Introducing foreign material that alters evidence integrity
C. Proper labeling of evidence
D. Storing evidence in secure lockers
B. Introducing foreign material that alters evidence integrity
Contamination occurs when evidence is improperly handled,
compromising its reliability.
, 8. Which tool is most appropriate for collecting latent fingerprints?
A. Bare hands
B. Adhesive tape lifter or fingerprint powder
C. Water spray bottle
D. Metal tongs only
B. Adhesive tape lifter or fingerprint powder
These tools help visualize and preserve latent fingerprints without
damaging ridge detail.
9. What is the purpose of crime scene photography?
A. For media publication
B. To replace physical evidence collection
C. To document scene conditions as they are found
D. To enhance suspect interrogation
C. To document scene conditions as they are found
Photography preserves an accurate visual record of the crime scene
before evidence is disturbed.
10. Which evidence is considered biological?
A. Glass fragments
B. DNA from blood or saliva
C. Tool marks
D. Shoe impressions
B. DNA from blood or saliva
Technician Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of maintaining chain of custody for
evidence?
A. To increase conviction rates
B. To ensure evidence integrity from collection to court
C. To allow officers to analyze evidence privately
D. To speed up laboratory processing
B. To ensure evidence integrity from collection to court
The chain of custody documents every transfer of evidence to
preserve its authenticity and prevent tampering or contamination.
2. Which item is most critical when labeling physical evidence?
A. Officer’s personal opinion
B. Suspect’s confession
, C. Unique case identifier
D. Media publication date
C. Unique case identifier
A unique case identifier ensures evidence can be accurately traced
back to the correct investigation.
3. What is the first action at a crime scene for an evidence technician?
A. Interview witnesses
B. Collect all visible evidence immediately
C. Secure and protect the scene
D. Write the final report
C. Secure and protect the scene
Securing the scene prevents contamination, loss, or alteration of
evidence before processing begins.
4. Which of the following best describes trace evidence?
A. Large weapons found at a scene
B. Testimonial statements from witnesses
C. Small, often microscopic materials transferred during a crime
D. Digital video recordings
C. Small, often microscopic materials transferred during a crime
Trace evidence includes materials like hair, fibers, and paint chips
that can link suspect and victim.
5. What is the proper packaging for a wet biological sample?
A. Airtight plastic bag
, B. Paper bag or breathable container
C. Glass container
D. Aluminum foil only
B. Paper bag or breathable container
Wet biological evidence must be air-dried and stored in breathable
packaging to prevent mold and degradation.
6. Which principle governs the admissibility of scientific evidence in
many courts?
A. Miranda Rule
B. Frye or Daubert Standard
C. Exclusionary Rule
D. Double Jeopardy Rule
B. Frye or Daubert Standard
These standards determine whether scientific evidence is reliable and
admissible in court.
7. What is contamination in forensic evidence handling?
A. Enhancing evidence clarity
B. Introducing foreign material that alters evidence integrity
C. Proper labeling of evidence
D. Storing evidence in secure lockers
B. Introducing foreign material that alters evidence integrity
Contamination occurs when evidence is improperly handled,
compromising its reliability.
, 8. Which tool is most appropriate for collecting latent fingerprints?
A. Bare hands
B. Adhesive tape lifter or fingerprint powder
C. Water spray bottle
D. Metal tongs only
B. Adhesive tape lifter or fingerprint powder
These tools help visualize and preserve latent fingerprints without
damaging ridge detail.
9. What is the purpose of crime scene photography?
A. For media publication
B. To replace physical evidence collection
C. To document scene conditions as they are found
D. To enhance suspect interrogation
C. To document scene conditions as they are found
Photography preserves an accurate visual record of the crime scene
before evidence is disturbed.
10. Which evidence is considered biological?
A. Glass fragments
B. DNA from blood or saliva
C. Tool marks
D. Shoe impressions
B. DNA from blood or saliva
